Lecture 13 - Flowers and Fertilisatin

Question 1

In plants, female gametes form within ..

Male gametes form within ..

Answer 1

carpels, stamen

-these cells not laid down early in development

Question 2

A plant with its A, B and C domain genes flower is made up of:
…, …, … and …

Answer 2

sepal, petal, stamen, carpel

Question 3

A plant with its A domain (APETAL2) missing is made up of:

…, …, … and …

Answer 3

carpel, stamen, stamen, carpel

• APETAL2 is expressed in outer rings
• no sepal or petal

Question 4

A plant with its B domain (PISTILLATA) missing is made up of:
…, …, … and …

Answer 4

sepal, sepal, carpel, carpel

• PISTILLATA is expressed in the middle rings of a plant
• no petal or stamen

Question 5

A plant with its C domain (AGAMOUS) missing is made up of;

…, …, … and …

Answer 5

Sepal, stamen, stamen, sepal

• It’s expressed in inner rings
• no petal or carpel

Question 6

LEAFY activation depends on … signals perceived in the leaves

Answer 6

environmental

Question 7

Transgenic aspen trees expressing … LFY can produce flowers after …-… months rather than .. years

Answer 7

Arabidopsis

3-6 months, 10 years

Question 8

in plants germline cells are determined .. in development, while in animals germline cells are set …

Answer 8

late

early

Question 9

endosperm is ..

zygote is ..

Answer 9

triploid
- sperm fuses with two polar nuclei
diploid
- sperm fuses with egg